Carton blank for a bottle cap



FIG. 1 is a front view of a carton blank for a bottle cap, showing our new design in a partially assembled position;

FIG. 2 is a rear view thereof; and,

FIG. 3 is a front, left side and bottom perspective view thereof.

The features shown in broken lines depict portions of the carton blank for a bottle cap that form no part of the claimed design. 

CLAIM The ornamental design for a carton blank for a bottle cap, as shown and described. 